/Engine/Plugins/Media/PixelStreaming/Source/PixelStreamingHMD/Public/PixelStreamingHMD.h
Reports all devices currently available to the system, optionally limiting the result to a given class of devices.
virtual bool EnumerateTrackedDevices ( [TArray](API\Runtime\Core\Containers\TArray)< int32 > & OutDevices, EXRTrackedDeviceType Type )